Released: Oct 1977.
Genre: Art rock, Pop rock, Progressive rock.
Label: Jet, United Artists, Columbia.
Number Of Tracks: 17.
ELO is a symfonic rock group and thus contains synthesizers and violins. The use of those instruments are significant for making ELO progressive.

Release Date: Jun 1983.
Label: Jet.
Genres: Album Rock, Prog-Rock/Art Rock, Pop/Rock.
Number Of Tracks: 11.
Originally conceived of as a double album, and wisely whittled down to one on release, Secret Messages was routine, formulaic Electric Light Orchestra.